Roy Lewallen wrote:
Suppose you have a thin antenna of any length. Look at the current
distribution on the last few degrees of the antenna. I believe you'll
find that it's the same regardless of the antenna length.

For a 1/2WL dipole, it is also the same at the center of the
antenna and at all other points anywhere on the antenna. The
standing wave current phase cannot be used to measure phase
shift in a wire or a coil or a top hat or a stub. The phase
of standing wave current is meaningless.

If one makes the top hat large enough, one should see an
abrupt ~180 phase reversal in the standing wave current.
This happens on each side of a current minimum point.
--
73, Cecil http://www.qsl.net/w5dxp